Ange, I am the same as you, I usually only drink alcohol at the weekend and stick to vodka and diet juice, but drink far too much of it! I can drink a full half bottle in a night. Luckily I don't crave any food when drinking alcohol but I just don't know when to stop drinking! lol I am fine during the week but really bad at the weekend.
I have decided for the next two weeks I'm not going to touch any alcohol (plus I am on Alli weight loss tablets now so don't want the side effects lol) hopefully this will also help with my weight loss. Let us know how you get on with your weight loss.
Kirsty xx